- VS2012: build/tests

- JSON: style and exceptions catch by ref fix
- NumberParser: case-insensitive hex parsing
- Dynamic::Var: const std::string& cast operator specialization (coaxing std::string ctor)
- LocalDateTime: strftime fix (buffer too small for full tz string, use %Z instead of %z - makes no difference on windows but is more portable)
- small buildwin.cmd vsvars32.bat call fix

Foundation/src/Var.cpp

@@ -69,6 +69,15 @@ Var::~Var()
 }
 
 
+Var::operator const std::string & ()
+{
+	if (typeid(std::string) != _pHolder->type())
+		*this = this->convert<std::string>();
+
+	return extract<std::string>();
+}
+
+
 Var& Var::operator = (const Var& other)
 {
 	Var tmp(other);